IF (NOT EXISTS
	(SELECT * FROM syscolumns
	 WHERE id=object_id('Cases') AND name='InjuryDate'))
BEGIN
	ALTER TABLE Cases ADD InjuryDate datetime
END
GO

IF (EXISTS
	(SELECT * FROM syscolumns
	 WHERE id=object_id('Injuries') AND name='InjuryDate'))
BEGIN
	ALTER TABLE Injuries DROP COLUMN InjuryDate
END
GO
